TABLE 1.
Comparison of Cobas Amplicor MTB with culture for detection of M. tuberculosis in sputum specimens from 151 patients with suspected active pulmonary tuberculosis
| Specimen type (no. of specimens) | Cobas Amplicor MTBa
|
|||
|---|---|---|---|---|
| Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) | |
| All specimens (n = 324) | 83 (73–91) | 99 (98–100) | 97 (89–100) | 95 (92–98) |
| Smear positive (n = 55) | 90 (79–97) | NDb | 96 (86–99) | ND |
| Smear negative (n = 269) | 68 (47–85) | ND | 100 (100–100) | ND |
a
The 95% confidence intervals are in parentheses.
b
ND, not determined.